/Engine/Source/Developer/ProfileVisualizer/Public/SBarVisualizer.h
Called when the user clicked bar graph's expand button
[FReply](API\Runtime\SlateCore\Input\FReply) ExpandBar ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FVisualizerEvent](API\Developer\ProfileVisualizer\FVisualizerEvent) > BarGraphEvents )